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A117923 as a simple table

na(n)
11
22
33
44
55
66
77
88
99
1010
1115
1212
1317
1414
1511
1616
1713
1818
1919
2020
2121
2222
2323
2424
2525
2634
2727
2828
2929
3038
3131
3230
3333
3440
3535
3626
3743
3836
3941
4032
4139
4242
4337
4444
4553
4654
4749
4848
4955
5050
5145
5246
5351
5452
5547
5656
5757
5872
5965
6064
6173
6262
6359
6470
6571
6658
6769
6868
6961
7060
7163
7266

[1,2,3,4,5,6,7,8,9,10,15,12,17,14,11,16,13,18,19,
 20,21,22,23,24,25,34,27,28,29,38,31,30,33,40,35,
 26,43,36,41,32,39,42,37,44,53,54,49,48,55,50,45,
 46,51,52,47,56,57,72,65,64,73,62,59,70,71,58,69,
 68,61,60,63,66]